5
Technical Description
Troubleshooting and Corrective Action
130/140 Dual Stage Rotary Vane Pumps User Manual/ 87-900-937-01(L)
SYMPTOM PROBABLE CAUSE SUGGESTED REMEDY CARD REF.
D) Electrical protections
not set.
Adjust the protections.
E) Oil too viscous
because of low room
temperature.
Heat the oil up to a
temperature of 20 °C or use
an oil recommended for low
temperatures.
102
F) Direction of rotation
inverted (only 3-phase
motors).
Change over two phase wires
of the electric power supply.
2 The pump stops
(stalls).
A) Seizure of some
internal parts.
Proceed as at 1-C.
B) Oil very dirty. Proceed as at 1-B.
3 The pump overheats. A) Too much friction
inside.
Proceed as at 1-C.
B) Oil ducts clogged
inside.
Try changing the oil,
otherwise disassemble the
pump and clean it well.
102
111
4 Too much oil drained
off by the exhaust.
A) Gas Ballast device
broken (always open).
Check the device to ensure
the gas ballast is properly
adjusted.
111
B) Heavy duty work (high
suction pressures or very
frequent cycles).
Check condition of the oil
trap filter.
C) Leak in system. Check the system (see
“Note”).
5 The pump is loosing
oil.
A) Seal on shaft
defective.
Replace the oil seal and the
anti-wear bushing.
110
B) Other gaskets
defective.
Identify the areas where
seeping occurs and check the
associated gaskets.
Refer to the
card related
to involved
item
C) Oil level window
broken
Replace the oil level window.
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